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High-velocity oxygen-fuel spray parameter optimization of nanostructured WC–10Co–4Cr coatings and sliding wear behavior of the optimized coating
Highlights Spray parameters of nanostructured WC–Co–Cr powder are optimized by Taguchi method. The important sequence of spray parameters on the coating hardness is suggested. WC–Co–Cr (OSP) coating has a uniform microstructure with high microhardness. WC–Co–Cr (OSP) coating exhibits higher wear resistance compared with steel Cr12MoV.
Abstract In this paper, the Taguchi method was employed to optimize the spray parameters (spray distance, oxygen flow and kerosene flow) to achieve the highest hardness and, in turn, the best wear resistance of the high-velocity oxygen-fuel (HVOF) sprayed nanostructured WC–10Co–4Cr coating by investigating the correlation between the spray parameters and the hardness. The important sequence of spray parameters on the hardness of the coatings is kerosene flow>oxygen flow>spray distance, and the kerosene flow is the only significant factor. The optimal spray parameter (OSP) for the coating is obtained by optimizing hardness (330mm for the spray distance, 2000 scfh for the oxygen flow and 6.0 gph for the kerosene flow). The coating deposited under the OSP with low porosity and high microhardness consists predominately of WC and a certain amount of W2C phases. The coating deposited under the OSP exhibits better wear resistance compared with the cold work die steel Cr12MoV. The material removal of the coating is the extrusion of the ductile Co–Cr matrix followed by the crack and the removal of the hard WC particles.
High-velocity oxygen-fuel spray parameter optimization of nanostructured WC–10Co–4Cr coatings and sliding wear behavior of the optimized coating
Highlights Spray parameters of nanostructured WC–Co–Cr powder are optimized by Taguchi method. The important sequence of spray parameters on the coating hardness is suggested. WC–Co–Cr (OSP) coating has a uniform microstructure with high microhardness. WC–Co–Cr (OSP) coating exhibits higher wear resistance compared with steel Cr12MoV.
Abstract In this paper, the Taguchi method was employed to optimize the spray parameters (spray distance, oxygen flow and kerosene flow) to achieve the highest hardness and, in turn, the best wear resistance of the high-velocity oxygen-fuel (HVOF) sprayed nanostructured WC–10Co–4Cr coating by investigating the correlation between the spray parameters and the hardness. The important sequence of spray parameters on the hardness of the coatings is kerosene flow>oxygen flow>spray distance, and the kerosene flow is the only significant factor. The optimal spray parameter (OSP) for the coating is obtained by optimizing hardness (330mm for the spray distance, 2000 scfh for the oxygen flow and 6.0 gph for the kerosene flow). The coating deposited under the OSP with low porosity and high microhardness consists predominately of WC and a certain amount of W2C phases. The coating deposited under the OSP exhibits better wear resistance compared with the cold work die steel Cr12MoV. The material removal of the coating is the extrusion of the ductile Co–Cr matrix followed by the crack and the removal of the hard WC particles.
High-velocity oxygen-fuel spray parameter optimization of nanostructured WC–10Co–4Cr coatings and sliding wear behavior of the optimized coating
Hong, Sheng (author) / Wu, Yuping (author) / Wang, Bo (author) / Zheng, Yugui (author) / Gao, Wenwen (author) / Li, Gaiye (author)
2013-10-02
6 pages
Article (Journal)
Electronic Resource
English
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Sliding wear behavior of nanostructured WC–Co–Cr coatings
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